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More than a month after 18-year-old David Granados was killed by a hit-and-run driver, his family is asking the Los Angeles City Council to approve a $50,000 reward to encourage witnesses to come forward. Authorities are looking for an older male who was driving an older model grey or silver Mercedes Benz M-class SUV. Tena Ezzeddine reports from Valley Glen for the NBC4 News at 6 p.m. on April 28, 2013. (Published Sunday, Apr 28, 2013)

Updated at 7:31 PM PST on Sunday, Apr 28, 2013

Devastated family members of a teenage bicyclist killed in a hit-and-run crash will ask the Los Angeles City Council on Tuesday to approve a $50,000 reward for information leading to the driver who collided with their loved one.

David Alexander Granados, 18, was riding his bicycle on March 24 along Oxnard Street near Bellaire Avenue in the Valley Glen area when he was struck by a driver, who continued on after colliding with the teenager.

Granados was taken to the hospital where he died the next day, police said. Family members said the crash happened days after Granados' 18th birthday.

Authorities are looking for the driver of what appears to be a grey or silver Mercedes Benz M-class SUV, model year 2000 to 2004. The driver -- caught on surveillance video, embedded below -- may be an older male, authorities said. A passenger is believed to have been in the SUV.

The victim’s family members are expected to join city and law enforcement officials at 9 a.m. Tuesday at Los Angeles City Hall to formally announce the $50,000 reward motion, meant to encourage witnesses to come forward.

"I understand people really don't want to get involved, but the point where we're begging for money, we're begging for you to help us," said Marvin Granados, the victim’s cousin. "They don't understand the tremendous pain we’re going through every day."

Marvin Granados nightly lights candles at a growing memorial where flowers and a handwritten sign declaring "Justice will prevail for those who kill others" mark the intersection where his cousin was killed.

Anyone with information about the fatal crash is asked to call LAPD Valley Traffic Division detectives at (818) 644-8063, 1-877-LAPD-24-7, or anonymously at 1-800-222-TIPS (800-222-8477).